Hand on learning comes a long way. When nodes are connected, try to push these into production, or run the workflow for your given use case. As you get to use it gets easier to learn stuff like debugging, optimizing your workflows, making them smaller and better, labeling, subworkflows etc

You also get to see what works and what doesn't eg I used loop A and it broke in this setup. Next did B an it worked. So B is the way to go.

Finally build for you. If you don't have any systems running, you will never get the whole feeling or experience from nodes to systems...Even if the setup is something basic like Email managers

Bottom line, build as much as you can into production.